Hoisting device



(No Mo-d el.) 2 Sheets-8heet 2,

' A. C. DINKEY'. HOISTING DEVICE.

No. 595,561. Patented Dec. 14,1897.

- U ITED STATES ALVA O. DINKEY, OF MUNHALL, PENNSYLVANIA.

Ho|s |Ne DEVICE.

SPECIFICATION forming part of Letters Patent No. 595,561, dated December 14, 1897.

Application filed November 28, 1896. Serial No; 618,724. (No model.)

To all whom it may concern.-

Be it known that I, ALVA O. DINKEY, of

' Munhall, in the county of Allegheny and State hoisting apparatus shown as applied to ingottongs. Fig. 2 is a detail View showing the arrangement of the hoisting-chain. Fig. 3 is a top plan View of the apparatus, and Fig. 4 is a vertical section on the line IV IV of Fig. 3.

My invention relates to the apparatus employed for hoisting tongs, ladles, scoops, and similar devices and for operating the said devices in any'position to which they are'lifted or lowered; and it consists, broadly, in providing a hoisting-chain which passes over a hoisting-drum and an operating-chain which passes over a winding-drum, the winding and hoisting drums having actuating connections between them and means being provided for changing the speed of the winding-drum, so as to draw or slacken the operating-chain.

It also consists in the construction and arrangement of the parts, as hereinafter more fully described, and set forth in the claims.

In the drawings, in which I show my apparatus as applied to the hoisting and operating of ingot-tongs, 2 represents the frame or crossf head of thetongs, having jaws 3 3, provided with operating levers or arms 4 4, connected by links 5 to a pulley-block 6. The pulleyblock'6 is enwrapped by two bights of a hoisting-chain 8, the two end portions of which pass to and are operated by the main hoisting-drum 7, while the intermediate central portion of the hoisting-chain passes over a small pulley 9.

Thus startingat the hoisting-drum the chain 8 extends from the drum downwardly around the pulley 6, upwardly.

over the pulley 9, downwardly around the pulley 6 again,'and thence back to the main drum 7 The operating or opening chain 10 is secured to the tongs frame or cross-head, and thence extends up through the pulleyblock 6 to a winding-drum 11, which is mounted, preferably, parallel with the main drum 7.

12 represents the shaft of the main drivingmotor, this shaft having a pinion 13 intermeshing with a toothed wheel 14 upon the shaft of the main hoisting-drum.

The auxiliary or winding drum 11 is loose upon its shaft 15, which shaft is provided with a toothed wheel 16, intermeshing with the wheel 14, and this drum 11 is provided with a hub 17, which extends through the bearing 18 and is provided with a toothed wheel 19, intermeshing with a pinion 20, secured to a counter-shaft 21. At the other end of the shaft 21 is secured a toothed wheel 22, which intermeshes with a pin ion 23, secured at the end of the armature-shaft 24 of a rotary electric motor 25.

The shaft 24 is in alinement with the maindrum shaft 15, and bearing upon a pulley 26 upon the armature-shaft is a brake-band 27, which isoperated by a bell-crank lever 28, mounted on the motor-frame, the end of the lever 28 being acted upon by a spring 29, which normally presses the brake-band upon the pulley, thus giving a clutch connection between the motor and the armature-shaft. The bell-crank lever is also provided with a cross-bar 30, carrying the cores 31 of two solenoids 32, which when energized act in opposition to the spring 29 to unclamp the brakeband and releasethe connection between the armature-shaft and the rotary motor. The rotary motor, as shown in Fig. 3, is provided with a hub 33, which is keyed to the protrud ing end portion of the shaft 15, so that as the main drum is rotated it rotates the shaft 15 of the auxiliary or winding drum, and therefore rotates the motor 25, keyed to such shaft, this motor, through its clutch connection with the armature-shaft, rotating that shaft. The counter-shaft 21, being rotated by the con.- necting-gearing, in turnrotates .the wheel 19 and the auxiliary drum, to which this wheel is keyed. The gearing-connections between the main drum and the auxiliary drum are so arranged that the drums will wind up or pay out their chains at a proper rate of speed,

so that the tongs may be raised and lowered without any relative motion of the jaws. When, however, it is desired to move the jaws, in the case of ingot-tongs, as shown in the drawings, the operator first throws the solenoids 32 into an electric circuit and energizes them, so that they, acting upon the cores 31, swing the bell-crank lever 28 and sever the clutch connection between the motor and its armature-shaft. The current is then supplied to the motor by brushes bearing upon the four rings 34, secured to the large circular plate 35, these rings being suitably insulated from each other. The armature may thus bedriven at any desired speed,

either faster or slower than that given it by the connections from the main drum, so that the opening-chain may be wound up or paid out relatively to the movement of the hoisting-chain. may take place at any point of elevation of the tongs.

The advantages of my invention result from the use of a winding-drum separate from the hoisting-drum, so that they may be made of diiferent diameters, and the number of loops of one chain is independent of that of the other and from the use of means for changing the speed of the winding-drum relatively to that of the main drum.

By using an opening-chain passing directly to the auxiliary drum without using an in- It is evident that this operation termediate movable sheave or other device:

to act upon the intermediate portion of the opening-chain I am able to use the entire length of the opening-chain, which is Very important in the tipping of ladles, the operating of scoops, &c. Moreover, the auxiliary drum may be used as a hoist independently of the main hoist.

Bythe words carrying mechanism in the claims I mean to cover, broadly, any operating mechanism carried upon the hoisting-v chain-such, for instance, as tongs, ladles,

&c.-while by the words auxiliary operating-chain I mean a chain separate from the load-carrying chain and which does not normally assistin carrying the load, it being employed for opening, closing, tipping, discharging, or otherwise operating upon the carrying mechanism.

Instead of driving one of the drums at a difierent speed when the clutch connection is severed I may of course entirely stop one of the'drums, and I intend to cover either form in my broader claims.

Many changes may be made in the actuating connections between the two drums and in the arrangement of the rotary motor and other parts, and the device may be employed for many other purposes than operating tongs, without departing from my invention, since I 'claim 1. In hoisting apparatus, the combination of a hoisting-chain, a hoisting-drum over which the said chain passes, a carrying mechanism entirely supported by the hoistingchain,an auxiliary operating-chain connected to and actuating the carrying mechanism, a winding drum over which the operatingchain passes, actuating connections between the two drums, and means for changing the speed of'one of these drums to draw or slacken the operating-chain.

2. In hoisting apparatus, a hoisting chain, a hoisting-drum over which said chainpasses, a carrying mechanism entirely supported by the hoisting-chain, an auxiliary operatingchain connected to and actuating the carrying mechanism, a winding-drum over which the operating-chain passes, actuating connections between the two drums, means for severing said actuating connections, and means for driving one of these drums at a diiferent speed after the severing of the connections.

3. In hoisting apparatus, the combination of a hoisting-chain, a hoisting-drum over which the said chain passes, an operatingchain, a winding-drum over which the operating-chain passes, said winding-drum being loose upon its shaft, actuating connections between the hoisting-drum and the windingdrum shaft, a clutch arranged to connect the winding-drum with its shaft, and a motor arranged to drive the winding-drum when the clutch connection is severed.

4. 'In hoisting apparatus, a hoisting-chain, a hoisting-drum over which said chain passes, an operating-chain, a winding-drum over which the operating-chain passes, said winding-drum being loose upon its shaft, gear connections between the ,main drum and the winding-drum shaft, a rotary electric motor secured to the winding-drum shaft, said motor having a clutch connection with its armature-shaft, and actuating connections between the armature-shaft and the windingdrum.

'In testimony whereof I have hereunto set my hand.

ALVA C. DINKEY.

\Vitnesses:

G. I. I-IoLnsHIP, II. M. CoRWIN. 

